Paper bag



(Model.) 2 Sheets-Sheet'. 1.

D. APPEL.

PAPER-BAG.

110.389.353. pq1%1'16nted Sept. 11, 1888.

Unoauto-z. M 1M @Hoff/mags (Model.) 2 Sheena-sheen 2.

D. APPEL.

I PAPER BAG. Noa 389,353. Patented Sept.A 11, 1888..

IINTTen STATES PATENT Truce@ DANIEL APPEL, OF CLEVELAND, OHIO, ASSIGNORTO THE UNION PAPER BAG MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

PAPER BAG.

SPECIFICATION forming part o Letters Patent No. 389,353, dated Septemberll, 1888.

(Model.)

.To @ZZ whom it may concern:

Be it known that l, DANIEL APPEL, a citizen of the United States,residing at Cleveland, county of Cuyahoga, and State of Ohio,

have invented certain new and useful Improvements in Paper Bags, fullyset forth in the following specification and represented in theaccompanying drawings.

This invention relates generally to paper 1o bags, and particularly tothat class 0f bags known as the square77 or bellows-sided bag, such asis fully set forth in Letters Patent No. 123,811, to L. C. Crowell. Asis well known to those acquainted with this art and the use of thisclass of bags, it has been a great desideratum to so form the bag thatcertain creases shall be imparted thereto adjacent to its bottom whichwill definitely define thelines upon which the bag-bottoni will bedistended into 2o rectangular form when the bag is opened to be filled.Many methods have heretofore been proposed looking to theaccomplishmentof this object; and the present invention consists in a bag providedwith certain folds which define certain lines which ultimately cause thebag-bottom to assume the rectangular form when the bag is opened withmore readiness.

In the accompanying drawings, Figure l is 3o a view of a bag-blankprovided with the longitudinal creased lines upon which the blank isfolded to form it into a bellows sided tube, and-with other creasedlines upon which the blank .is folded. in accordance with thisinvention. Fig. 2 isasimilar view of the blank, illustrating theposition of certain folds in forming it into tubular form. Fig. 3 is aview of the completed tubular blank. Fig. 4. is a crosssection ofthesame,taken on the line 4 Li. Fig. 5

4o is an enlarged perspective view of the end of the tubular blank, oneof the bellows folds being slightly distended. Fig. f5 is a crossseetionof the same,taken on theline 6 6. Fig. 7 is a longitudinal section ofthe same, taken on the line 7 7 of Fig. 3. Fig. 8 is a view of thecompleted bag in its flat condition. Fig. 9 is a perspective view of thecompleted bag distended, looking at its bottom. Fig. 10 isacross-section through the distended bag, look- 5o ing into the interiorof the bag at its bottom.

As is well known, bags of this class are commonly made from an endlessweb of paper or other suitable material that is folded on longitudinallilies by suitable means into bellowssided tubular form, as shown inFig. 3, in such manner that the outer edges of the web meet over thecenter' ofthe tube and are united by a longitudinal line ofpaste, thesaid tube being severed transversely into bag-blanks, ready to be formedinto bags by the formation of the 6c bot-toms. So far as the presentinvention is concerned, however, the improved bag may be formed fromsheets or blanks, asillustratedin Fig. 1, or from the web, as justdescribed.

In distending the bellows-sided bag from its flat condition into an opencondition the disposition of that portion. of the material of thebellows fold immediately adjacent to the bottom must be such that itwill lie against the bottom within the bag in an angular fold, the 7overtical walls of the bag rising at the termination of the angular foldsat right angles tothe bottoni. In order to define this ultimate angularfold of that portion of the material forming the bellows side, thepresent invention coutemplates providing the opposite sides of the bagwith wedge or conical shaped plicated folds C. (best seen in Fig. 5,) toinsure the bottom of the bag when distended partaking the desiredrectangular form, and the proper open- 8o ing of the bellows sides toConform to such form. In order to a more complete understanding of thedisposition of this plicated fold with relation to the bag-bottom, ageneral description of one manner of forming a bag with this peculiarfold will now be given, it being distinctly understood that theinvention is not confined to any particular mode of manipulati ng thematerial in providing the bag therewith. 9o

Starting from a proper-shaped blank, as seen in Fig. l, it will beprovided with the longitudinal creased lines a b c, which define thelines upon which the blank is folded in order to form the bellows sidesof the bag and bring the outer edges of the blank together over thecenter of the blank, to be there united by a line of paste, as beforeset forth, and transforming the blank into the fiat bellows-sided tubeseen in Figs. 3 and et.

The plicated folds may be formed by imparting to the blank, Fig. l,diagonal creased lilies d e z' m, extending diagonally across thematerial between the longitudinal creased lines a and b and b and c,respectively, the two pairs of the diagonal creased lines meeting atcom- IOI) ICS

mon points at the creased line b. Each pair of these diagonal creasedlines, as d e and .13 m, start from a common point, n o, on the creasedlines a and c, respectively, and gradually separate as they approach thecreased line b, thus forming between them a wedge-shaped piece, 2 3,respectively, the'base or greatest width of the wedge shape being at thecreased line b and gradually vanishing until the lines a and c are metat the points n and o. Preferably the longitudinal creased lines a b cwill be parallel from the edge A of the blank until the lines a and cmeet the points n and o, when they will be directed diagonally away froma right line, meeting the edge B of the blank at the points o' s, theline b not being changed from a right line. .The degree at which thelilies a and c depart from a right line will be found in practice tocorrespond with the degree of angularity between the diagonal line ewith respect to the line d andthe line m with the line z', and it may bestated the position ofthe points n and o on the lines a and c will becoincident with the rectangular line on which the bottom will form whenthe bag is distended, all of which will be more fully set forthhereinafter. In forming these diagonal creased lines into the plicatedor V- shaped folds C, with which the tubular blank and bag, when intheir flat condition, are ultimately provided, the wedge-shaped pieces 2and 3 are folded over on their lines d and i, so as to lie in contactwith the adjacent portion of the material lying between the lines a band b c, as seen in Fig. 2, thus foreshortening the length of thematerial on the line b and projecting that portion ofthe material onsaid line between the diagonal lines e and m and the edge'B of the blanktoward the center of the blank in advance of the major portion of theinner line of the bellows fold, as clearly seen in Fig. 2. This inwardprojecting of this portion of the bellows fold necessarily draws on theouter edges of the fold-that is, on the longitudinal lines a and c-andcauses it to fold on the lines from n to i' and o to s, thus 'in ameasure contracting the apparentwidth of the bag, as will be seen. rlheother side of the blank is similarly :manipulated to form the plicatedor V-shaped folds therein, and the outer edges of the blank are thenfolded over to its center andthe tubular blank is completed, as seen inFigs. 3, 4, and 5. The aps at this B end of the blank are then providedwith a line or lines of paste, and will be folded over on the transverseline l0 onto the body of the blank to form its bottom and complete theformation of the blank, as seen in Fig. 8. `This transverse folding ofthe end of the blank should be immediately in rear of the plicatedfolds,so as not to fold any portion of said fold into the bottomclosingfold; but it should be directly in rear of the edge x of the base of theplicated fold, so that the material between said fold and the end B ofthe blank is insuredbeing within the said transverse closing fold, andnot leave any loose material between the edge w and said transversefold. The manner in which the plicated or V-shaped folds C lie in thecompleted tubular blank or bag is seen in cross and transverse sectionin Figs. 6 and 7.

While the blank, as before stated, is apparently lessened in width atthe bottom-forming end, it does not in effectdecrease the width of thebag, but permits the extent to which it is apparently decreased in widthto be added to the material which lies within the diagonal lines formingthe angular folds which lie upon the bottom of the bag when it isdistended as in Fig. 10, so that a greater portion of the bottom isre-enforced by another thickness of material than has heretofore beenthe case in this class of bags. It may be remarked, in passing, that thediagonal lines e and m, upon which the bellows folds will lie on thebottom of the bag, forming the triangular pieces seen in Fig. 10,bounded by the lines a to x, av to c, and c to a, differ from similarlines upon ywhich the bellows folds have heretofore been folded, whichare substantially represented by the creased lines d and i, in that saidlines c and m are not at right angles to each other, as commonly thecase, and as are the lilies d and i, but form with each other a more orless acute angle, the effect of which is to cause the bottom, when thebag is distended as in Fig. 9, to assume the rectangular form shown withgreater readiness.

When the bag is distended as shown in Figs. 9 and l0, the plicated orVvshaped folds C will in a measure be obliterated by the adjacentportions of the btllo .vs folds forming the angular pieces shown in Fig.10, straightening out the folds on the lines d i, so as to lie flat onthe bag-bottom.

Vhat I claim is l. A square bag having at each of its opposite sidesadjacent to its bottom two V shaped folds, substantially as described.

2. A square bag having bellows folds in each of which, adjacent to thebottom, are two V-shaped folds, substantially as described.

3. The herein-described tubular blank for a bag, having inward-folded orbellows sides, a

portion of said bellows sides near one end of the blank being foldedbackward and inward on diagonal lines toward the center of the blank,4

whereby said portion of the bellows folds are extended inwardly beyondthe remaining and major portion of the bellows folds.

4. The herein-described bag, provided at each of its sides with thediagonal creased lines d e and i m.

5. The herein-described bag, provided with the longitudinal creasedlilies a, n, r, and b and c o s and diagonal creased lines d e and t' m.

In testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses.

DANIEL Arran.

Witnesses:

E. H. BoHM, SS. MARSH.

